Trichiasis - Eyelashes can grow inward towards the eye causing irritation. Sometimes new lashes form and grow in the wrong direction but usually abnormal re-growth of current lashes is the cause.

Vitreous floaters - Small condensations or formation of hard spots in the clear vitreous jelly filling of the eye result in small shadows cast on the retina which are perceived as floaters. Shapes can be described as strings, spots, webs, spiders, tadpoles, amoebas, germs, or flies.